中南大学学报（自然科学版）2016，Vol.47Issue(5)：1715-1721,7.DOI:10.11817/j.issn.1672-7207.2016.05.034
风屏障透风率对侧风下大跨度斜拉桥车-桥耦合振动的影响
Effect of wind barrier porosity on coupled vibration of train-bridge systemfor long-span cable-stayed bridgein crosswind
摘要
Abstract
In order to study effects of wind barrier porosity on coupled vibration of train-bridge system in crosswind,by usingstatic aerodynamic coefficients of both the trainsat different rail positions and the bridge deck with different pored wind barriers measured by the wind tunnel test, according to the principle of total potential energy with stationary value in elastic system dynamics, the coupling vibration equation of train-bridge system considering the wind load was built up to calculate dynamic responses of trains and bridge of a long-span cable stayed bridge in crosswind.The results show that differences in the influence of wind barrier porosity changefrom 10% to 40% on the lateral displacement of mid-span between windward conditions and leeward conditions are significant. In windward conditions, the influence of wind barrier porosity changing on the dynamic responses of trainsismore significant. Compared with the wind barrier porosity increases from 10% to 20%, the increase of derailment coefficient, rate of wheel load reduction and lateral swaying force of train is more significant when the wind barrier porosity increases from 30% to 40%.关键词
风屏障/斜拉桥/耦合振动/动力响应Key words
wind barrier/cable-stayed bridge/coupling vibration/dynamic response分类
交通工程引用本文复制引用
何玮,郭向荣,邹云峰,何旭辉,杨著..风屏障透风率对侧风下大跨度斜拉桥车-桥耦合振动的影响[J].中南大学学报（自然科学版）,2016,47(5):1715-1721,7.基金项目
国家自然科学基金资助项目(51322808，51508580，U1534206)；中国铁路总公司科技研究开发计划项目(2015G002-C)；中国博士后科学基金资助项目(2014M562133)；中南大学“创新驱动计划”项目(2015CX006)(Projects(51322808,51508580, U1534206) supported by the NationalNaturalScience Foundation of China （51322808，51508580，U1534206）
Project(2015G002-C) supported by the China Railway Corporation （2015G002-C）
Project(2014M562133) supported by the Chinese Postdoctoral Science Foundation （2014M562133）
Project(2015CX006) supported by the Innovation-driven Plan in Central South University) （2015CX006）
